Plate hammer for impact crusher and impact crusher

Abstract

The invention discloses a plate hammer for an impact crusher and the impact crusher. The longitudinal axis extends in the z direction and is parallel to the extending direction of the positioning groove in the installation position, the vertical axis extends in the y direction and points to the radial top face of the plate hammer in the installation position, and the transverse axis extends in the x direction and points to the impact side face of the plate hammer. At least one end, along the vertical axis, of the plate hammer is a working head, and in the extending direction of the transverse axis, the rear impact side face and the front impact side face are sequentially arranged at intervals and are arranged on the two sides of the working head respectively. Wherein the front impact side surface is provided with a convex part at a position close to the radial top surface, and the surface of the convex part protrudes out of the front impact side surface.

Description

Technical Field

[0001] The present application relates to the field of crushers, and in particular to a plate hammer for an impact crusher and an impact crusher. Background Art

[0002] Impact crushers are used to crush mineral materials. During the crushing process, the materials enter the hammer operating area and are thrown toward the impact liner.

[0003] The hammer is a wear part and must be replaced regularly. The working head of the hammer currently used is easy to break and has insufficient wear resistance, so the replacement frequency is high. For this reason, we can consider increasing the strength and hardness of the material, but the increase in hardness will correspondingly reduce the toughness of the material and make the hammer more likely to break. If a break occurs, it will also damage other parts such as the crusher rotor; alternatively, the wear time can be extended by increasing the overall size, but this will greatly increase the material cost, and the weight will increase significantly, making it unsafe and inconvenient to hoist and use. Summary of the invention

[0004] In view of at least some of the problems and needs raised above, the present invention proposes a plate hammer for an impact crusher and an impact crusher.

[0005] On one hand, the present application provides a plate hammer for an impact crusher, wherein the plate hammer has, in a Cartesian coordinate system, a longitudinal axis extending in the z direction and parallel to the extending direction of the positioning groove in the installed position, a vertical axis extending in the y direction and pointing to the radial top surface of the plate hammer in the installed position, and a transverse axis extending in the x direction and pointing to the impact side surface of the plate hammer;

[0006] At least one end of the plate hammer along the vertical axis is a working head, and in the extending direction along the transverse axis, the rear impact side surface and the front impact side surface are sequentially spaced and respectively arranged on both sides of the working head;

[0007] Wherein, the front impact side surface is provided with a convex portion at a position close to the radial top surface, and the surface of the convex portion protrudes from the front impact side surface.

[0008] In one embodiment, along the x direction, a protruding dimension X1 of the convex portion relative to the front impact side surface is greater than 0 and less than or equal to 150 mm;

[0009] Preferably, a protruding dimension X1 of the apex of the convex portion relative to the front impact side surface is 20 mm-80 mm.

[0010] In one embodiment, the protrusion is a column extending along the longitudinal axis, and in the direction along the longitudinal axis, the longitudinal dimension of the column is basically consistent with the longitudinal dimension of the front impact side; or, the protrusion is arranged on the front impact side at intervals along the longitudinal axis.

[0011] In one embodiment, the projection shape of the convex portion on the xy plane is a semicircle, a triangle, a square or a trapezoid.

[0012] In one embodiment, the number of the protrusions is two or more, and they are arranged adjacent to each other in sequence along the vertical axis direction.

[0013] In one embodiment, the other end of the plate hammer along the vertical axis is an assembly head that matches the positioning groove; in the extension direction along the transverse axis, the rear limit side and the front limit side are arranged in sequence and are respectively arranged on both sides of the assembly head; the spacing between the rear impact side and the front impact side is X2, and the spacing between the rear limit side and the front limit side is X3, X2>X3, and the difference range between X2 and X3 is 10-100mm; preferably, the difference range between X2 and X3 is 20-50mm.

[0014] In one embodiment, the distance X2 between the rear impact side surface and the front impact side surface is 120 mm-125 mm; the distance X3 between the rear limit side surface and the front limit side surface is 90 mm-110 mm.

[0015] In one embodiment, the front impact side surface and the rear impact side surface are respectively located on two sides of the yz plane;

[0016] Moreover, the distance that the front impact side is offset relative to the yz plane along the transverse axis direction is L1, and the distance that the rear impact side is offset relative to the yz plane along the transverse axis direction is L2, L1>L2, and the difference range between L1 and L2 is 0-100mm; preferably, the difference range between L1 and L2 is 20-50mm.

[0017] In one embodiment, a distance L1 of the front impact side surface offset relative to the yz plane along the transverse axis direction is 70-75 mm, and a distance L2 of the rear impact side surface offset relative to the yz plane along the transverse axis direction is 45-50 mm.

[0018] In one embodiment, a reinforcing block is embedded in the portion of the plate hammer close to the radial top surface; a boundary line is formed between the convex surface and the front impact side surface, and in the extension direction along the vertical axis, the first surface and the second surface are sequentially spaced on both sides of the reinforcing block; and in the direction along the vertical axis and pointing to the radial top surface, the lateral size of the reinforcing block gradually increases, the spacing between the side of the first surface close to the boundary line and the boundary line is B1, the spacing between the second surface and the radial top surface is B2, B1>B2, and the difference range between B1 and B2 is 0-80mm; preferably, the difference range between B1 and B2 is 10-40mm.

[0019] In one embodiment, a distance B1 between the side of the first surface close to the boundary line and the boundary line is 18 mm-23 mm, and a distance B2 between the second surface and the radial top surface is 13 mm-15 mm.

[0020] In one embodiment, the transverse dimension A1 of the first surface of the reinforcement block is 80 mm-100 mm.

[0021] In one embodiment, the plate hammer is made of martensitic alloy steel, and the composition ratio is Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.59%, Cr: 3.0%-3.9%;

[0022] Preferably, Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.5%, Cr: 3.0%-3.4%.

[0023] In one embodiment, the rear limiting side surface is provided with a supporting shoulder at one end along the vertical axis;

[0024] The rear limiting side is connected to the supporting shoulder, and the dimension Y1 of the rear limiting side 122 along the vertical axis is 50mm-150mm. The rear limiting side is provided with a shrinkage feeder, which is located in the middle of the rear limiting side along the longitudinal axis.

[0025] In one embodiment, there are two working heads, which are respectively arranged at two ends of the blow hammer along the vertical axis, and the two working heads are constructed rotationally symmetrically about the longitudinal axis.

[0026] On the other hand, the present application also provides an impact crusher, comprising the above-mentioned plate hammer for the impact crusher.

[0027] Compared with the prior art, this application has at least the following effects:

[0028] In this embodiment, a convex portion is provided at a part of the front impact side surface near the radial top surface, and the surface of the convex portion protrudes from the front impact side surface. This is because the part of the front impact side surface near the radial top surface has the highest frequency of contact with the material and directly bears the impact of the material. Therefore, the convex portion protruding from the front impact side surface is designed in this part to enhance the impact resistance and reduce the risk of fracture. It has been verified that the fracture frequency can be reduced by more than 80%. At the same time, the designed convex portion increases the thickness D of the working head near the radial top surface. A larger thickness can enhance the ability to resist impact fracture, extend the wear life, and it takes a longer time to grind it flat, thereby reducing the replacement frequency. The locally added convex portion will not significantly increase the material cost and workpiece weight. At the same time, the convex portion increases the overall strength of the plate hammer, and the added convex portion can also provide a larger accommodation space for the setting of the ceramic reinforcement block, and a larger ceramic reinforcement block can be set, which directly increases the volume of the impact working area.

[0029] The following will provide a more detailed description of the best embodiment of the present application in conjunction with the accompanying drawings so that the features and advantages of the present application can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application are briefly introduced below. The drawings are only used to show some embodiments of the present application, but not to limit all the embodiments of the present application thereto.

[0031] Figure 1 A three-dimensional structural diagram of a plate hammer for an impact crusher provided in one embodiment of the present application;

[0032] Figure 2 for Figure 1 An end view of

[0033] Figure 3 A schematic diagram of installing a plate hammer on a rotating shaft provided in an embodiment of the present application;

[0034] Figure 4 A structural view of a plate hammer end provided in another embodiment of the present application;

[0035] Figure 5 for Figure 1 Stereoscopic image of the hammer from another perspective;

[0036] Figure 6 for Figure 5 The rear side view of the blow bar;

[0037] Figure 7 A three-dimensional structural diagram of a plate hammer for an impact crusher provided in another embodiment of the present application;

[0038] Figure 8A three-dimensional structural diagram of a plate hammer for an impact crusher provided in yet another embodiment of the present application;

[0039] Fig. 9 A three-dimensional structural diagram of a plate hammer for an impact crusher provided in another embodiment of the present application;

[0040] In the figure,

[0041] 10. Rotating shaft; 11. Positioning groove; 12. Front positioning component; 13. Rear positioning component;

[0042] 100. Plate hammer;

[0043] 110, working head; 111, front impact side; 112, rear impact side; 113, convex part; 114, radial top surface; b, boundary line;

[0044] 120, assembly head; 121, front limit side; 122, rear limit side; 123, support shoulder; 124, groove; 125, fixing pin; a, feeding riser;

[0045] 130, notch; 140, through hole;

[0046] 200, reinforcement block; 210, first surface; 220, second surface. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the technical solution of the present application clearer, the technical solution of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present application hereinafter. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second" and similar words used in the patent application specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity restriction. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] refer to Figure 1-Figure 3 , a blow hammer for an impact crusher, the blow hammer 100 having, in a Cartesian coordinate system, a longitudinal axis extending in the z direction and parallel to the extending direction of the positioning groove 11 in the installed position, a vertical axis extending in the y direction and pointing to the radial top surface 114 of the blow hammer 100 in the installed position, and a transverse axis extending in the x direction and pointing to the impact side surface of the blow hammer 100;

[0050] The blow hammer 100 has a working head 110 at at least one end along the vertical axis, and the rear impact side surface 112 and the front impact side surface 111 are arranged in sequence and spaced apart and respectively disposed on both sides of the working head 110 in the extending direction along the transverse axis.

[0051] The front impact side surface 111 is provided with a convex portion 113 at a position close to the radial top surface 114 , and the surface of the convex portion 113 protrudes from the front impact side surface 111 .

[0052] Specifically, the rotating shaft 10 of the crusher can rotate around the rotating axis F; four plate hammers 100 distributed along the circumference are installed on the rotating shaft 10, and the plate hammers 100 extend parallel to the rotating axis F of the rotating shaft 10.

[0053] The plate hammer 100 generally comprises a middle section and end portions at both ends of the middle section. Figure 2 The origin of the coordinate system is located in the center of the middle section of the blow hammer 100, that is, the origin is at half the length (z axis), height (y axis) and width (thickness) (x axis) of the middle section of the blow hammer 100; the coordinate system relates to the corresponding blow hammer 100 and not to the rotation axis 10. Since the blow hammer 100 may be slightly tilted in the installed position, Figure 3The coordinate system of the middle blow hammer 100 may also be slightly tilted about the longitudinal axis (z-axis) of the blow hammer 100 itself. Figure 3 The x direction of the coordinate system points to a direction perpendicular to the front side surface; the y direction is a radial direction and points away from the rotation axis F; and the z axis is parallel to the front side surface and the rotation axis F. The positioning groove 11 is a recess extending in the longitudinal direction of the rotating shaft 10, that is, parallel to the rotation axis F.

[0054] In this embodiment, the front impact side surface 111 is provided with a convex portion 113 at a part close to the radial top surface 114, and the surface of the convex portion 113 protrudes from the front impact side surface 111. This is because the part of the front impact side surface 111 close to the radial top surface 114 has the highest frequency of contact with the material and directly bears the impact of the material. Therefore, the convex portion 113 protruding from the front impact side surface 111 is designed in this part to enhance the impact resistance and reduce the risk of fracture. It has been verified that the fracture frequency is reduced by more than 80%. At the same time, the designed convex portion 113 increases the thickness D of the working head 110 at the part close to the radial top surface 114. The larger thickness can enhance the ability to resist impact fracture, extend the wear life, and it takes a longer time to grind it flat, thereby reducing the replacement frequency. The locally added convex portion 113 will not significantly increase the material cost and workpiece weight. At the same time, the added convex portion 113 can also provide a larger accommodating space for the setting of the ceramic reinforcement block, and a larger ceramic reinforcement block can be set, which directly increases the volume of the impact working area and increases the overall strength of the hammer.

[0055] In the present application, when a material block hits the surface of the convex portion 113, since an angle is formed between the surface of the convex portion 113 and the vertical front impact side surface 111, the surface of the convex portion 113 will change the trajectory direction of the material block, causing it to splash to an adjacent portion. The material block whose direction has been changed has a high probability of hitting the front impact side surface 111 again and being crushed for the second time. The material block can contact different portions of the working head 110 multiple times, which can improve the crushing efficiency per unit time; and since the convex portion 113 is arranged at a local position of the front impact side surface 111 close to the radial top surface 114, most of the material blocks first contact the convex portion 113, and most of the material blocks contacting the front impact side surface 111 are splashed onto its surface after colliding with the convex portion 113, so that the impact force borne by the front impact side surface 111 is significantly reduced, and the probability of breakage and wear is reduced.

[0056] refer to Figure 2In some embodiments, along the x-direction, the protruding dimension X1 of the convex portion 113 relative to the front impact side 111 is greater than 0 and less than or equal to 150 mm. According to tests, within this size range, the impact resistance and fracture resistance property can be effectively improved, and when the size is too large, a greater material cost is required. Preferably, the protruding dimension X1 of the vertex of the convex portion 113 relative to the front impact side 111 is 20 mm-80 mm. When the protruding dimension X1 is too large (greater than 80 mm), it may hinder the contact between the material and the main part of the front impact side 111, which is not conducive to improving work efficiency, and the increase in impact resistance and fracture resistance is not obvious.

[0057] refer to Figure 1 and Figure 2 In some embodiments, the convex portion 113 is a column extending along the longitudinal axis (z direction), and in the direction along the longitudinal axis (z direction), the longitudinal dimension of the column is consistent with the longitudinal dimension of the front impact side surface 111. Alternatively, in other embodiments, the convex portions 113 are arranged on the surface of the front impact side surface 111 at intervals along the longitudinal axis (z direction).

[0058] Specifically, in this embodiment, the protrusion 113 can be a whole cylinder extending along the z direction. The cylinder has a large area and a high probability of contacting the material, which is conducive to exerting the advantages of the present application; it can also be arranged in an interval distribution on the front impact side 111. When the interval distribution is arranged, it is equivalent to strengthening the local position on the front impact side 111 of the working head 110 in a point-like form, which has higher configuration flexibility and stronger applicability to the scene.

[0059] In addition, the arrangement of multiple points can increase the contact frequency between the convex part 113 and the material. When a material block hits the surface of one of the convex parts 113, since the upper, lower, left and right peripheral sides of the point-shaped convex part 113 all form an angle with the vertical front impact side 111, the peripheral side of the convex part 113 will change the trajectory direction of the material block, causing it to splash to the adjacent part on the side. When multiple convex parts 113 are arranged in parallel at intervals, the material block whose direction has been changed has a high probability of hitting the surface of the adjacent convex parts 113 on the left and right sides and being impacted and crushed. A single material block can contact multiple convex parts 113 in sequence with a high probability, which can improve the crushing efficiency per unit time. The front impact side 111 is below the convex part 113, and most of the contacted material blocks are splashed onto its surface after collision with multiple convex parts 113 above. Therefore, the impact force borne by the front impact side 111 is lower, and the probability of rupture and wear is significantly reduced.

[0060] refer to Figure 5 , 78. In some embodiments, the projection shape of the convex portion 113 in the xy plane is semicircular, triangular, square or trapezoidal. Specifically, the convex portion 113 can be in a variety of forms, all of which have the effect of enhancing impact resistance, reducing the risk of fracture, and improving wear resistance. In particular, when a semicircular shape is adopted, there are no sharp corners on the surface. When the material impacts the working head 110, the curved surface of the convex portion 113 will not generate local concentrated stress when it contacts the material. The force on each part of the surface of the convex portion 113 is uniform, which is conducive to maintaining the stability of the cross-sectional shape, and there will be no morphological changes during long-term operation. When the projection shape of the convex portion 113 is a triangle or a trapezoid, the material will generate stress locally when it hits the sharp corners of the surface, which may cause damage and fragmentation at the corners.

[0061] Of course, in addition to the above forms, the projection shape of the protrusion 113 can take a variety of forms, and this application does not limit it.

[0062] refer to Fig. 9 In some embodiments, the number of the protrusions 113 is two or more, and they are arranged adjacent to each other in sequence along the vertical axis direction.

[0063] Specifically, when the number of protrusions 113 is two or more, there are more areas on the front impact side 111 where the protrusions 113 are arranged, and the arrangement of multiple protrusions 113 can increase the contact frequency between the protrusions 113 and the material. When a material block hits the surface of one of the protrusions 113, due to the angle formed between the surface of the protrusion 113 and the vertical front impact side 111, the surface of the protrusion 113 will change the trajectory direction of the material block, causing it to splash to an adjacent part. Multiple protrusions 113 are arranged adjacent to each other, and the material block whose direction has been changed has a high probability of hitting the surface of another adjacent protrusion 113 and being impacted and crushed. A single material block can contact multiple protrusions 113 in sequence, which can improve the crushing efficiency per unit time. The front impact side surface 111 is far away from the radial top surface 114, and less material falls directly onto its surface or falls onto its surface after being hit by the convex part once. That is, most of the material blocks contacted by the front impact side surface 111 are splashed onto its surface after being hit by multiple convex parts 113. Therefore, the impact force borne by the front impact side surface 111 is lower, and the probability of breakage and wear is significantly reduced.

[0064] refer to Figure 2 In some embodiments, the hammer 100 has an assembly head 120 matching the positioning groove 11 at the other end along the vertical axis; in the extension direction along the transverse axis (x direction), the rear limiting side surface 122 and the front limiting side surface 121 are arranged in sequence and arranged on both sides of the assembly head 120, respectively, the distance between the rear impact side surface and the front impact side surface is X2, the distance between the rear limiting side surface and the front limiting side surface is X3, X2>X3, and the difference range between X2 and X3 is 10-100mm.

[0065] Specifically, the spacing X2 between the rear impact side 112 and the front impact side 111 can be 120mm-125mm; the spacing X3 between the rear limit side 122 and the front limit side 121 can be 90mm-110mm. With the design of this embodiment, X2>X3, the difference range is 10-100mm, the working head 110 part has a larger thickness ratio, the wear time is longer, and a larger wear-resistant reinforcement block can be built in; the thickness of the assembly head 120 can meet the assembly fixing strength requirements, and the thickness of the assembly head 120 is less than the thickness of the working head 110, avoiding excessive material costs. As a preferred embodiment, the difference between X2 and X3 is 20-50mm, the size of the working head will not be too large, and the material cost will not be increased too much.

[0066] refer to Figure 2 In some embodiments, the front impact side surface 111 and the rear impact side surface 112 are respectively located on two sides of the yz plane;

[0067] Moreover, the front impact side surface is offset relative to the yz plane by a distance L1 along the transverse axis direction, and the rear impact side surface is offset relative to the yz plane by a distance L2 along the transverse axis direction, L1>L2, and the difference between L1 and L2 ranges from 0 to 100 mm.

[0068] Specifically, the distance L1 of the front impact side 111 offset relative to the yz plane along the transverse axis direction can be 70-75mm, and the distance L2 of the rear impact side 112 offset relative to the yz plane along the transverse axis direction can be 45-50mm. The front impact side 111 is in direct high-frequency contact with the material and bears a stronger impact force, so a larger offset distance L1 can improve the impact resistance, which is beneficial to improving work efficiency and extending service life; the rear impact side 112 is not in direct contact with the material surface and bears less impact, so setting the offset distance L2 will be relatively small, but compared with the traditional plate hammer (offset distance is less than 30mm), the offset distance and offset thickness dimensions are also slightly increased, and thickening is beneficial to improving wear resistance. As a preferred embodiment, the difference range of L1 and L2 is 20-50mm, and the difference in the offset dimensions of the two will not be too large, which can avoid the situation where the working head installation is tilted under the left and right of the lever due to excessive offset, and reduce the difficulty of hoisting configuration.

[0069] refer to Figure 4In some embodiments, a reinforcing block 200 is embedded in a portion of the hammer 100 close to the radial top surface 114; a boundary line b is formed between the surface of the convex portion 113 and the front impact side surface 111, and in the extension direction along the vertical axis, the first surface 210 and the second surface 220 are sequentially arranged at intervals on both sides of the reinforcing block 200; and in the direction along the vertical axis (y direction) and pointing to the radial top surface 114, the lateral size of the reinforcing block 200 gradually increases, the spacing between the side of the first surface close to the boundary line and the boundary line is B1, the spacing between the second surface and the radial top surface 114 is B2, B1>B2, and the difference range of B1 and B2 is 0-80mm.

[0070] Specifically, the material of the plate hammer 100 is metal such as iron, and the reinforcing block 200 is made of high-hardness material such as ceramic. In this embodiment, the reinforcing block 200 is coated in the iron block by hot melting, that is, the reinforcing block 200 is placed in molten iron for hot melting and cooled to form. In actual production, when the spacing B2 is less than 13mm, the fusion performance of the iron layer and the reinforcing block 200 is poor and the interface is prone to cracking. This may be because during hot melting, if the covering thickness of the surface iron material is small, it may cause the two materials to fail to fuse together at the molecular level or even crack at the interface. Therefore, the spacing B2 needs to be greater than or equal to 13mm, and the actual optional range is It is 13mm-15mm; and, under the same production conditions, the spacing B1 size needs to be set to be greater than or equal to 18mm to reduce the occurrence of cracks at the interface between the iron layer and the reinforcement block 200. This may be because there is an obvious sharp angle at the junction b between the protrusion 113 and the front impact side 111, and the local stress is concentrated at this position. It is more difficult to fuse the iron and the reinforcement block 200 at this position and a thicker coating thickness is required. Therefore, the spacing B1 is greater than the spacing B2. When the thickness of the spacing B1 is greater than 23mm, the material cost increases and the performance improvement is not obvious. That is, the value of B1 in this application is 18mm-23mm. Based on this limitation, the lateral dimension of the first surface 210 is limited, and due to the setting of the convex portion 113 of the present application, the second surface 220 can extend into the convex portion 113 in the lateral direction, so the lateral dimension is larger, that is, in the direction along the vertical axis and pointing to the radial top surface 114, the lateral dimension of the reinforcing block 200 gradually increases, making the reinforcing block 200 with a trapezoidal cross section; the reinforcing block 200, such as ceramic, has a very high hardness (HV1600), and the increase in size is more conducive to increasing the wear resistance. Of course, in addition to the trapezoidal shape, the reinforcing block 200 can also be designed as other shapes, and this application does not limit it.

[0071] Preferably, the difference between B1 and B2 is in the range of 10-40 mm, which is not so large as to cause the area where the reinforcing block 200 is arranged to be squeezed and reduced, thereby ensuring that there is a large enough area to arrange the reinforcing block, thereby increasing the wear resistance life and impact resistance.

[0072] As another preferred embodiment, the distance between the first surface 210 and the radial top surface 114 is smaller than the distance between the boundary line b and the radial top surface 114. When such a configuration is adopted, the reinforcing block 200 is wrapped in the head region where the convex portion 113 is located. The head region has a large cross-sectional area, which is conducive to placing a larger volume of reinforcing block 200, thereby enhancing wear resistance and overall performance.

[0073] refer to Figure 4 In some embodiments, the transverse dimension A1 of the first surface 210 of the reinforcing block 200 is 80mm-100mm. The reinforcing block 200 is located in the head region of the working head 110 close to the radial top surface 114. The head region has a convex portion 113 and a large cross-sectional area, which is conducive to placing a large volume of the reinforcing block 200. Therefore, the transverse dimension A1 of the first surface 210 of the reinforcing block 200 is designed to be 80mm-100mm; at the same time, since the transverse dimension A2 of the second surface 220 is greater than A1 and the size is larger, the overall size of the reinforcing block 200 is significantly increased, which is very conducive to increasing the wear resistance.

[0074] In some embodiments, the material of the plate hammer 100 is selected as martensitic alloy steel, and the composition ratio is Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.59%, Cr: 3.0%-3.9%. The shape and structure of the traditional plate hammer are not strong enough and easy to break. If a harder and more wear-resistant material is selected, the probability of breaking will be greater under the same stress conditions, so the overall performance cannot be improved by improving the material. The material composition selected in this application is Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.59%, Cr: 3.0%-3.9%. No cracks will occur, and the hardness can reach HRC58, the wear resistance is improved by 10-15%, and the comprehensive performance is significantly improved. This may be because the added protrusion 113 increases the local strength, and the volume of the reinforcement block 200 embedded in the end position corresponding to the protrusion 113 is significantly increased, and the strength and crack resistance of the hammer 100 are enhanced in terms of structural design. Under this premise, the specially designed components are fused by weight: Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.59%, Cr: 3.0%-3.9%. The hardness of the hammer 100 is improved and cracks will not easily occur. The components in the alloy, such as the C content, can even be increased to 0.59%, and the hammer 100 is not easy to break. However, when certain components in the alloy, such as C content greater than 0.59% and Cr greater than 3.9%, the improvement in hardness and comprehensive performance is not obvious, and some cracks will appear under harsh working conditions. Therefore, when a material containing Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.59%, and Cr: 3.0%-3.9% is selected as the material of blow hammer 100, the performance is significantly improved, the hardness can reach HRC58, the wear resistance is improved by 10-15%, and the comprehensive performance is good.

[0075] More preferably, Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.50%, Cr: 3.0%-3.4%. Compared with traditional products, this component material has significantly increased hardness and wear resistance, better toughness performance, and better comprehensive mechanical properties, making it suitable for use in most working scenarios.

[0076] refer to Figure 5 and Figure 6In some embodiments, the rear limiting side surface 122 is provided with a supporting shoulder 123 at one end along the vertical axis;

[0077] The rear limiting side surface 122 is connected to the supporting shoulder 123, and the dimension Y1 of the rear limiting side surface 122 along the vertical axis (y direction) is 50mm-150mm. The rear limiting side surface 122 is provided with a feeding riser a, and the feeding riser a is located in the middle of the rear limiting side surface 122 along the longitudinal axis direction (z direction). The plate hammer 100 is usually formed by casting. Specifically, during casting, molten iron at about 1400°C is first poured into the mold through a casting gate; when defective pores that are not fully filled appear locally, a second step is required to be implemented through a feeding riser a with a larger radial size to supplement the pouring to fill the pores. When the second step is implemented, the overall temperature in the mold has dropped, and the fluidity of the feeding molten iron has dropped. If the feeding riser a is set at one end of the plate hammer 100 along the longitudinal axis, it is difficult for the feeding molten iron to flow to the far end, such as the defective part at the other end of the longitudinal axis. In the present application, in order to facilitate the arrangement of a large radial feeding riser a, the dimension Y1 range of the rear limiting side surface 122 along the vertical axis is designed to be 50mm-150mm, and the feeding riser a is arranged in the middle of the rear limiting side surface 122 along the longitudinal axis. At this time, the feeding riser a is in the middle of the plate hammer 100 along the longitudinal axis, and the distance between the feeding riser a and the two ends of the plate hammer 100 along the longitudinal axis is consistent. Then, the distance between the feeding molten iron entering through the feeding riser a in the middle and the defective part will not be too large. Even if the temperature of the feeding molten iron is low, it can be smoothly and quickly transmitted to any part of the mold, thereby ensuring the feeding effect and avoiding the quality problem of defective pores that cannot be fed. On the other hand, since the rear limit side 122 is connected to the support shoulder 123 and there is an obvious angle between the two, when the rear limit side 122 is milled and processed with a high-hardness milling cutter, if the dimension of the rear limit side 122 along the vertical axis is too small, the milling cutter will easily and frequently contact the angle between the rear limit side 122 and the support shoulder 123 during milling. At this time, the milling cutter part is suspended in the air and stress concentration occurs. Therefore, the present application expands the dimension Y1 of the rear limit side 122 along the vertical axis to a dimension of 50mm-150mm. When the milling cutter processes the rear limit side 122, it will not frequently contact the angle between the rear limit side 122 and the support shoulder 123, thereby reducing the stress concentration phenomenon.

[0078] In some other embodiments, there are two working heads 110, which are respectively disposed at two ends of the blow hammer 100 along the vertical axis, and the two working heads 110 are constructed rotationally symmetrically about the longitudinal axis.

[0079] In the present embodiment, compared to a single working head 110, two rotationally symmetrical working heads 110 can be used sequentially. When one working head 110 reaches its wear limit, it can then be flipped around its own longitudinal axis, and the other working head 110 of the plate hammer 100 that has not been worn and is located in the positioning groove 11 in the rotor is moved to the outside, so that the plate hammer 100 can be used until the wear limit of the two working heads 110 is reached. The two working heads 110 are respectively provided with protrusions 113 and the protrusions 113 of the two working heads 110 are rotationally symmetrically arranged, and each working head 110 can have the structural features mentioned above.

[0080] It is worth mentioning that the support shoulder 123 is supported on the rear positioning component 13, and the rear positioning component 13 is welded into the rotor.

[0081] The front positioning components 12 and the rear positioning components 13 on both sides of the plate hammer 100 guide and position the plate hammer 100 in the longitudinal direction (z-axis) and the circumferential direction at the same time. Further, the plate hammer 100 is prevented from moving in the longitudinal direction (z-axis) of the rotor by at least one groove 124 adjacent to the support shoulder 123, and the groove 124 is used to accommodate a detachably inserted fixing pin 125, which passes through the hole in the plate rear positioning component 13 and is embedded in the groove 124.

[0082] Preferably, two grooves 124 and two fixing pins 125 are provided. When the plate hammer 100 is broken, the two fixing pins 125 can fix the plate hammer 100 at the same time, thereby preventing the broken part from flying out and causing a safety accident.

[0083] The end of the plate hammer 100 is provided with a notch 130 at the end side adjacent to the supporting shoulder 123, and a through hole 140 is provided in the notch 130. The through hole 140 and the notch 130 are used to accommodate a lifting tool so as to lift the plate hammer 100 into the positioning groove 11 or remove it from it.

[0084] The exemplary implementation modes of the present application are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present application, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present application can be combined in various ways without exceeding the protection scope of the present application, which is determined by the attached claims.

Claims

1. A plate hammer for an impact crusher, characterized in that: The blow hammer has, in a Cartesian coordinate system, a longitudinal axis extending in the z direction and parallel to the extending direction of the positioning groove in the installed position, a vertical axis extending in the y direction and pointing to the radial top surface of the blow hammer in the installed position, and a transverse axis extending in the x direction and pointing to the impact side of the blow hammer; At least one end of the plate hammer along the vertical axis is a working head, and in the extension direction along the transverse axis, the rear impact side surface and the front impact side surface are sequentially spaced and respectively arranged on both sides of the working head; Wherein, the front impact side surface is provided with a convex portion at a position close to the radial top surface, and the surface of the convex portion protrudes from the front impact side surface.

2. A plate hammer for an impact crusher according to claim 1, characterized in that: In the x direction, a protruding dimension X1 of the convex portion relative to the front impact side surface is greater than 0 and less than or equal to 150 mm; Preferably, a protruding dimension X1 of the apex of the convex portion relative to the front impact side surface is 20 mm-80 mm.

3. A plate hammer for an impact crusher according to claim 1, characterized in that: The protrusion is a column extending along the longitudinal axis, and in the direction along the longitudinal axis, the longitudinal dimension of the column is substantially consistent with the longitudinal dimension of the front impact side surface; or, the protrusion is arranged on the front impact side surface at intervals along the longitudinal axis.

4. A plate hammer for an impact crusher according to claim 1, characterized in that: The projection shape of the convex portion on the xy plane is semicircular, triangular, square or trapezoidal.

5. A plate hammer for an impact crusher according to claim 1, characterized in that: The number of the protrusions is two or more, and they are arranged adjacent to each other in sequence along the vertical axis direction.

6. A plate hammer for an impact crusher according to claim 1, characterized in that: The other end of the plate hammer along the vertical axis is an assembly head matching the positioning groove; in the extension direction along the transverse axis, the rear limit side surface and the front limit side surface are arranged in sequence and are respectively provided on both sides of the assembly head; the spacing between the rear impact side surface and the front impact side surface is X2, the spacing between the rear limit side surface and the front limit side surface is X3, X2>X3, the difference range between X2 and X3 is 10-100mm; preferably, the difference range between X2 and X3 is 20-50mm.

7. A plate hammer for an impact crusher according to claim 6, characterized in that: The distance X2 between the rear impact side surface and the front impact side surface is 120mm-125mm; the distance X3 between the rear limit side surface and the front limit side surface is 90mm-110mm.

8. A plate hammer for an impact crusher according to claim 1, characterized in that: The front impact side surface and the rear impact side surface are respectively located on two sides of the yz plane; Moreover, the distance that the front impact side is offset relative to the yz plane along the transverse axis direction is L1, and the distance that the rear impact side is offset relative to the yz plane along the transverse axis direction is L2, L1>L2, and the difference range between L1 and L2 is 0-100mm; preferably, the difference range between L1 and L2 is 20-50mm.

9. A plate hammer for an impact crusher according to claim 8, characterized in that: The distance L1 along the transverse axis direction that the front impact side surface is offset relative to the yz plane is 70-75 mm, and the distance L2 along the transverse axis direction that the rear impact side surface is offset relative to the yz plane is 45-50 mm.

10. A plate hammer for an impact crusher according to claim 1, characterized in that: A reinforcing block is embedded in the portion of the plate hammer close to the radial top surface; a boundary line is formed between the convex surface and the front impact side surface, and in the extension direction along the vertical axis, the first surface and the second surface are sequentially spaced apart on both sides of the reinforcing block; and in the direction along the vertical axis and pointing to the radial top surface, the lateral size of the reinforcing block gradually increases, the spacing between the side of the first surface close to the boundary line and the boundary line is B1, the spacing between the second surface and the radial top surface is B2, B1>B2, and the difference range between B1 and B2 is 0-80mm; preferably, the difference range between B1 and B2 is 10-40mm.

11. A plate hammer for an impact crusher according to claim 10, characterized in that: A distance B1 between the side of the first surface close to the boundary line and the boundary line is 18 mm-23 mm, and a distance B2 between the second surface and the radial top surface is 13 mm-15 mm.

12. A plate hammer for an impact crusher according to claim 10, characterized in that: The transverse dimension A1 of the first surface of the reinforcing block is 80 mm-100 mm.

13. A plate hammer for an impact crusher according to claim 10, characterized in that: The plate hammer is made of martensitic alloy steel, and its composition ratio is Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.59%, Cr: 3.0%-3.9%; Preferably, Si: 0.3%-1.0%, Mo: 0.4%-0.7%, Ni: 0.7%-1.0%, Mn: 0.4%-1.0%, C: 0.42%-0.5%, Cr: 3.0%-3.4%.

14. A plate hammer for an impact crusher according to claim 6, characterized in that: The rear limiting side surface is provided with a supporting shoulder at one end along the vertical axis; The rear limiting side is connected to the supporting shoulder, and the dimension Y1 of the rear limiting side 122 along the vertical axis is 50mm-150mm. The rear limiting side is provided with a shrinkage feeder, which is located in the middle of the rear limiting side along the longitudinal axis.

15. A plate hammer for an impact crusher according to claim 1, characterized in that: There are two working heads, which are respectively arranged at two ends of the blow hammer along the vertical axis, and the two working heads are constructed rotationally symmetrically about the longitudinal axis.

16. An impact crusher, characterized in that: A plate hammer for an impact crusher comprising any one of claims 1-15.

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